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| 5/11/2011 1:08 PM | |
Joined: 11/9/2008 Last visit: 10/29/2024 Posts: 410 Rating:
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Dear All, Please explain me difference between C- Bus,K-Bus and P-Bus. Regards, Yogendra G |
| 5/11/2011 2:38 PM | |
Joined: 9/27/2006 Last visit: 11/7/2024 Posts: 12293 Rating:
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Hello Yogendra; The backplane bus of the S7 CPUs is seperated in a P-Bus (peripherical bus) for high-speed digital signals and a K-Bus (same as your C-Bus, used for communications with CPs, FMs, and networks). Here is the content of a German Wikipedia page (translated by Google): K-Bus (SPS)From Wikipedia, the free encyclopediaThe K-bus (also called communications bus) is a term coined by automation. About a K-bus there will becomprehensive exchange of data. In PLC technology, this bus, the task of exchanging data between the CPU of a PLC and its associated function and communication modules is realized. The K-Bus is as an internal bus of a programmable logic controller (PLC) to see that no external interfaces have to. It thus serves only to transport the necessary quantities of data within a PLC. For the necessary communication between the CPU of a PLC and its affiliates and output modules, the bus has no meaning. This data exchange is the P-bus (peripheral bus). Other discussions on P-Bus and K-Bus on the forum: /tf/WW/en/Posts/51865 /tf/WW/en/Posts/6241 Hope this helps, Daniel Chartier |
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| 5/12/2011 5:55 AM | |
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Joined: 11/9/2008 Last visit: 10/29/2024 Posts: 410 Rating:
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Hello Dchartier, Thanks for your information sharing and quick reply. Now understood very well. Regadrs, Yogendra G. |
| 10/10/2012 7:10 AM | |
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Posts: 51 Rating:
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Thanks Mr.Daniel Chartier |
| 9/4/2016 6:59 PM | |
Joined: 6/10/2016 Last visit: 9/14/2024 Posts: 7 Rating:
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Thanks for throwing more light. I still need to know how the p-bus and k-bus connector looks like. |
| 9/4/2016 8:52 PM | |
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Joined: 9/27/2006 Last visit: 11/7/2024 Posts: 12293 Rating:
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Hello Josh; If all you want is to see what the P-Bus and C-Bus (K-Bus in German) connectors look like, this is easy enough. Specially with the S7-400 family of processors, as for these CPUs these are parallel buses. Have a look at the attachment, taken partly from this manual: Automation System S7-400 Hardware and Installation https://support.industry.siemens.com/cs/ww/en/view/1117849 If what you are really looking for is the pinout for these buses, I wish you the best of luck. Siemens has never (to my knowledge) divulged these details to the public, they consider it proprietary information. It might be easier to reverse-engineer the serial P- and C-Buses for other S7 processors, such as the S7-300 and the S7-1200, but still the information will never be validated by Siemens. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 9/4/2016 9:05:10 PM |
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